Stoombierbrouwerij De Keyzer

Stoombierbrouwerij De Keyzer, also known as Brouwerij Bosch, is a former steam brewery located in the center of Maastricht, Netherlands. Its history dates back to the mid-17th century, when a brewery named 'Den alden Wolsack' stood on the site between Wycker Grachtstraat and Rechtstraat. In 1758, Peter Vliex owned the brewery, and from 1759, after it passed to his grandson Hubert Vliex, it was called 'De Keyzer'. In 1827, Nicolaas Antoon Bosch inherited the brewery through his wife Maria Antoinetta Vliex and expanded it into one of the largest breweries in Maastricht. By 1856, De Keyzer was the largest brewery in Maastricht. In 1868, the company was formalized as 'Firma N.A. Bosch'. Under the leadership of Willem August Bosch and later P.A. Ernest Bosch, the brewery modernized, adding a five-story malthouse, steam engines, and new markets in Brabant, Gelderland, and Groningen. In 1902, the name 'Stoombierbrouwerij De Keyzer' was adopted. The brewery ceased production in 1970, and since then the site has remained largely intact. Today, Brouwerij Bosch is a volunteer organization and museum, offering guided tours and beer tastings. The complex includes a malthouse, brewery, and brewer's house, and has been a national monument since 1996.

The history of Stoombierbrouwerij De Keyzer begins in the mid-17th century with a brewery called 'Den alden Wolsack' located between Wycker Grachtstraat and Rechtstraat in Maastricht. In 1758, Peter Vliex owned the brewery. After his death, it passed to his grandson Hubert Vliex in 1759, and from that time it was known as 'De Keyzer'. Hubert Vliex married Maria Anna Malchair in 1790, and their daughter Maria Antoinetta married Nicolaas Antoon Bosch in 1820. When Hubert Vliex died in 1827, the brewery passed to his daughter and son-in-law. Nicolaas Bosch, a colonial goods merchant, took over the management. At that time, Maastricht had about forty large and small breweries, and De Keyzer was a medium-sized enterprise. In 1844, Bosch requested authorization to establish a vinegar factory, an economic supplement to the brewery. By 1856, municipal excise records showed that De Keyzer had become the largest brewery in Maastricht. Nicolaas Bosch died in 1857. After his wife's death in 1866, the estate remained undivided until 1868, when it was divided among their five children. Hubert Bosch took over the brewery, and a partnership called 'Firma N.A. Bosch' was formed, dealing in colonial goods, operating a stone quarry, and brewing beer. Other activities such as vinegar, candle, salt, and pottery factories were divested. In 1870, Willem August Bosch led the construction of a new malthouse and brewery, adding a steam-powered grain mill. Between 1882 and 1885, adjacent properties were purchased, allowing the construction of a new five-story malthouse, the largest and most modern in South Limburg, and the installation of a new 8 hp steam engine and boiler. Willem August Bosch died in 1883, and P.A. Ernest Bosch took over. He expanded sales to Brabant, Gelderland, and Groningen, and in 1901 built the Grand Hotel de l'Empereur in Maastricht, named after Keyzerbier. The brewery owned the hotel until 1938. In 1902, Fernand Bosch became co-owner, and the firm was renamed 'Stoombierbrouwerij De Keyzer'. The old grain mill was demolished in 1910 to make way for a new brewhouse. Innovations such as pure yeast culture and artificial cooling were adopted, and in 1930 an ammonia compressor enabled continuous bottom-fermented beer production. However, the brewery decided not to brew pilsener itself, instead purchasing it from other breweries. In 1898, the Bosch family acquired the Grand Brasserie des Vennes in Liège, which collaborated with the Maastricht brewery. The outbreak of World War I disrupted operations. Brewing ceased in 1970, and the site has remained largely unchanged since. The buildings, including the malthouse, brewery, and brewer's house, have been a national monument since 1996. Today, Brouwerij Bosch is run by volunteers and offers tours and tastings.

• 1996

  Brewery buildings become a protected national monument.

• 1970

  Brewing ceases at the site.

• 1930

  Ammonia compressor enables continuous bottom-fermented beer production.

• 1910

  Old grain mill demolished; new brewhouse built.

• 1902

  Firm renamed 'Stoombierbrouwerij De Keyzer'; Fernand Bosch becomes co-owner.

• 1901

  Grand Hotel de l'Empereur is built, named after Keyzerbier.

• 1898

  Bosch family acquires Grand Brasserie des Vennes in Liège.

• 1883

  Willem August Bosch dies; P.A. Ernest Bosch takes over.

• 1882

  Purchase of adjacent properties for expansion.

• 1870

  Construction of new malthouse and brewery begins under Willem August Bosch.

• 1868

  Partnership 'Firma N.A. Bosch' is formed.

• 1856

  De Keyzer becomes the largest brewery in Maastricht.

• 1844

  N.A. Bosch requests authorization for a vinegar factory.

• 1827

  Nicolaas Antoon Bosch inherits the brewery through his wife.

• 1759

  Brewery passes to Hubert Vliex and is named 'De Keyzer'.

• 1758

  Peter Vliex owns brewery 'Den alden Wolsack' on the site.

Historic local brewery, once the largest in Maastricht, now a heritage museum and experience.

• Keyzerbier

  Flagship beer of the brewery.

• Bière de Maestricht

  Beer brewed in Maastricht and distributed in Liège.

• Pilsener

  Purchased from other breweries for café customers.

1. 1Bezoek en proef Brouwerij Bosch in Maastrichtbrouwerijbosch.nl
2. 2Stoombierbrouwerij De Keyzer - Wikidatawikidata.org
3. 3Stoombierbrouwerij De Keyzer - Wikipedianl.wikipedia.org